Gotowe bibliografie tematyczne / High Voltage Power Supply (HVPS)

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Gotowa bibliografia na temat „High Voltage Power Supply (HVPS)”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "High Voltage Power Supply (HVPS)"

Zhang, Jian, Rui Guan, Fei Guo, et al. "Study on the soft-start process of PSM high voltage power supply for ECRH." EPJ Web of Conferences 203 (2019): 04019. http://dx.doi.org/10.1051/epjconf/201920304019.

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The soft-start process of high voltage power supply (HVPS) based on pulse step modulation (PSM) for ECRH on EAST is introduced, which is the first procedure of system operation. The response process is detailed by proposing DC equivalent circuit model, process analysis and performance comparison is given under the conditions of different soft-start resistor parameters, and the theoretical analysis is proved by the simulation package ANSYS Simplorer simulations. The soft-start resistor is designed for the HVPS of 140GHz ECRH system for a smooth charging without overshoot of the capacitor[6], and the final experimental results show that it is in agreement with the theoretical analysis and is stable and reliable to the power devices.

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Wang, Mao, Wendong Ma, Yong Yang, et al. "Development of lower hybrid wave power feedback control and experiments on EAST." Journal of Instrumentation 18, no. 01 (2023): P01010. http://dx.doi.org/10.1088/1748-0221/18/01/p01010.

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Abstract A new method of power feedback control for the lower hybrid wave (LHW) systems on the experimental advanced superconducting tokamak (EAST) is presented. Different methods are applied to control the power of two LHW systems with different frequency at 2.45 GHz and at 4.6 GHz, respectively. The old method is applied to control the 4.6 GHz LHW power through the exciter of klystrons, and the new one is used to control the 2.45 GHz LHW power through the high voltage power supply (HVPS) system. The new method has been applied in EAST and successfully assisted the development of relevant experiments such as loop voltage control, q profile control.

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Anastasi, G. A., M. Buscemi, M. Aglietta, et al. "Validation of high voltage power supplies for the 1-inch photomultipliers of AugerPrime, the Pierre Auger Observatory upgrade." Journal of Instrumentation 17, no. 04 (2022): T04003. http://dx.doi.org/10.1088/1748-0221/17/04/t04003.

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Abstract In the framework of the upgrade of the Pierre Auger Observatory, a new high voltage module is being employed for the power supply of the 1-inch photomultiplier added to each water-Cherenkov detector of the surface array with the aim of increasing the dynamic range of the measurements. This module is located in a dedicated box near the electronics and comprises a low consumption DC-DC converter hosted inside an aluminum box. All the modules have undergone specific tests to verify their reliability in the extreme environmental conditions of the Argentinian pampa. In this paper, we describe the validation procedure and the facility developed to this aim. The successful results of the tests on the HVPS modules are presented and discussed.

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Bader, M. P., A. M. Kosyrev, and N. A. Kukuyuk. "ELECTROMAGNETIC COMPATIBILITY OF HIGH-VOLTAGE ELECTRICAL SYSTEMS." World of Transport and Transportation 14, no. 1 (2016): 210–18. http://dx.doi.org/10.30932/1992-3252-2016-14-1-22.

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[For the English abstract and full text of the article please see the attached PDF-File (English version follows Russian version)].ABSTRACT Analysis of performance and reliability of electrical equipment of high-voltage electrical systems (hereinafter - HVES) confirms the need to improve evaluation methods and mathematical modeling of transients in power lines (hereinafter - PL), at substations, and in grounding and protective devices. One of the main problems, however, remains improvement of safety and quality of HVES functioning in accordance with their EMC in modes of overvoltage effects, including determination of evaluation criteria, scientific substantiation of deep forced restrictions of external and internal overvoltage of electrical equipment, optimization of PL protection and substations of the system from different levels of voltage, electromagnetic interference that could cause serious accidents. Keywords: railway infrastructure, electrical power supply, electromagnetic compatibility, high-voltage electrical systems, lightning overvoltage, neutral of transformers. REFERENCES 1.Bader, M. P.Electromagnetic compatibility: Textbook [Elektromagnitnaja sovmestimost’: Uchebnik].Moscow, Transport publ., 2002, 640 p. 2.Bader, M.P., Inkov, Yu.M.Electromagnetic compatibility of traction power supply system and elements of infrastructure in areas with high speed traffic [Elektromagnitnaja sovmestimost’ sistemy tjagovogo elektrosnabzhenija i elementov infrastruktury na uchastkah s vysokoskorostnym dvizheniem].Elektrotehnika, 2014, Iss.8, pp.12-18. 3.Bader, M.P., Inkov, Yu.M.On increasing energy efficiency of converter equipment of traction substations [O povyshenii jenergeticheskoj effektivnosti preobrazovatel’nogo oborudovanija tjagovyh podstancij].Elektrichestvo, 2008, Iss.2, pp.60-65. 4.Marquardt, K. G.Electric power supply of electrified railways [Elektrosnabzhenie elektrificirovannyh zheleznyh dorog].4th ed., rev.and enl.Trans.from English.Moscow, Transport publ., 1982, 524 p. 5.Protection against short circuits feeding on «high» side of a step-down transformer from the traction network [Zashhita ot podpitki korotkih zamykanij na «vysokoj» storone ponizhajushhego transformatora so storony tjagovoj seti]/ A.Kondakov, A.Mizintsev, A.Buryanovaty, S.Rogach.RZD-Partner, 2001, Iss.3, p.111. 6.Tikhodeev, N.N., Shur, S. S.Insulation of electrical networks [Izoljacija elektricheskih setej].Leningrad, Energia publ., 1979, 304 p. 7.Rules for electrical installation [Pravila ustrojstva elektroustanovok].7th ed.Moscow, 2004, 225 p. 8.RD153-34.3-35.125-99 Manual for protection of electrical networks 6-1150 kV against lightning and internal overvoltage [RD153-34.3-35.125-99 Rukovodstva po zashhite elektricheskih setej 6-1150 kV ot grozovyh i vnutrennih perenaprjazhenij] / Ed.by N. N.Tikhodeev.2nd ed.St.Petersburg, Ministry of Energy of the Russian Federation, 1999, 205 p. 9.Instruction on grounding of power units on electrified railways [Instrukcija po zazemleniju ustrojstv elektrosnabzhenija na elektrificirovannyh zheleznyh dorogah].Moscow, Transport publ., 1997, 68 p. 10.Mamoshin, R. R.Improvement of power quality at traction substations of AC roads [Povyshenie kachestva energii na tjagovyh podstancijah dorog peremennogo toka].Moscow, Transport publ., 1973, 224 p. 11.Schwab, A. J.Electromagnetic Compatibility [Elektromagnitnaja sovmestimost’].Moscow, Energoizdat publ., 1995, 480 p. 12.Courtois, C.Bahnenergieversorgung in Frankreich.Elektrische Bahnen, 92 (1994) 6, S.167-170 und 7, S.202-205. 13.Figurnov, E. P.Relay protection [Relejnaja zashhita].Moscow, Transzheldorizdat publ., 2002, 343 p. 14.Mamoshin, R. R.Railway power supply system on AC94 / 27,5 kV with symmetrization traction loads [Sistema elektrosnabzhenija zheleznyh dorog na peremennom toke 94/27,5 kV s simmetrirovaniem tjagovyh nagruzok].Proceedings of scientific-practical conference «Electrification - basis of technical modernization of rail transport».Moscow, VNIIZhT, 2004, pp.58-60. 15.Kosarev, A. B.Basic theory of electromagnetic compatibility of AC traction power supply systems [Osnovy teorii elektromagnitnoj sovmestimosti sistem tjagovogo elektrosnabzhenija peremennogo toka].Moscow, Intekst publ., 2004, 272 p.

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Bressan, A., S. Carrato, C. Chatterjee, et al. "The high voltage system the novel MPGD-based photon detectors of COMPASS RICH-1 and its development towards a scalable HVPSS for MPGDs." Journal of Instrumentation 18, no. 07 (2023): C07014. http://dx.doi.org/10.1088/1748-0221/18/07/c07014.

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Abstract The COMPASS RICH-1 detector underwent major upgrade in 2016 with the installation of four novel MPGD-based photon detectors. They consist of large-size hybrid MPGDs with multi-layer architecture composed of two layers of Thick-GEMs and bulk resistive Micromegas. A dedicated high voltage power supply system, realized with commercial devices, has been put in operation to protect the detectors against errors by the operator, monitor and log voltages and currents at a 1 Hz rate, and automatically react to detector misbehavior; it includes also the HV compensation for the detector gas pressure and temperature variations. The needs posed to the high voltage power supply systems by the operation of Micro Pattern Gaseous Detectors pushed the development of a novel single channel HV system able to overcome the performance of the commercial devices in terms of high-resolution diagnostic features and intelligent dynamic voltage control. In this talk the COMPASS HV system and its performance are illustrated, as well as the stability of the novel MPGD-based photon detectors during the physics data taking at COMPASS. The performance of the novel single channel power supply system when connected to a single photon Micro Pattern Gaseous Detector is presented in realistic working condition during a test beam with the preliminary results of multiple channels operation.

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Yi-yun, Huang, Kuang Guang-li, Xu Wei-hua, et al. "Design and Simulation for the Pulse High-Voltage DC Power Supply (HVPS) of 1.2 MW/2.45 GHz HT-7U Lower Hybrid Current Drive System." Plasma Science and Technology 2, no. 6 (2000): 537–48. http://dx.doi.org/10.1088/1009-0630/2/6/006.

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Makov, Sergei, Boris Kudryavcev, Ilya Grinev, and Alexander Minaev. "High voltage energy efficiency power supply." E3S Web of Conferences 279 (2021): 02012. http://dx.doi.org/10.1051/e3sconf/202127902012.

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This article discusses the selection of operating modes for the high voltage power supply of the electrostatic dust collector. Methods of high voltage generation, voltage regulation in converters and the choice of the converter operation mode are considered.

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Yu, Gui Yin. "The High-Power of DC Power with Auto Tracking Power Frequency." Advanced Materials Research 383-390 (November 2011): 321–24. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.321.

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This paper analyzes the reason that the common thyristor trigger is unable to fulfill power supply in wide range changes of frequency. The high precise frequency/voltage converter is used to monitor and track frequency changes of the simultaneous power supply. The simultaneous signal and charge current source are provided by the converter for saw tooth wave trigger. The frequency of saw tooth wave changes as the same time the frequency of power supply changes in wide range. However, the amplitude of the saw tooth wave can be kept constant. This can achieve the controlled angle of the thyristor trigger does not change with the large-scale voltage frequency changes of the simultaneous power supply when the same Phase-shifted control voltage was used.

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Nan, Qiu, and Fan Yin Hai. "Digital Controlled High Power Mid-Frequency Pulsed Power Supply." Advanced Materials Research 108-111 (May 2010): 1332–37. http://dx.doi.org/10.4028/www.scientific.net/amr.108-111.1332.

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In this article a novel scheme of high power mid-frequency pulse power supply is proposed. The supply is made up of two major stages. First stage is dual interleaved buck chopper stage in order to make the DC bus and output pulse voltage controllable. Second stage is a inverter converting the DC voltage into a series of square AC voltage pulse. IGBT module(300A-1200V) is used as the main switch device for the proposed supply is a high power application. As we know large capacity power IGBT module can hardly work as high as 40Khz[1], so to solve this problem, interleaved control scheme is incorporated. Basic ideas are to share the total switching losses. To combine several converters working under certain sequence is the key point. Final output pulse frequency is 20-40Khz,voltage level is 0-800V, and pulse width is 0-90% changeable. The whole system is concise effective. Experimental results verified the feasibility of abovementioned power supply.

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Shao, Zhu Lei. "Research on 5V Internal Power Supply Circuit of Switching Power Supply." Applied Mechanics and Materials 571-572 (June 2014): 950–54. http://dx.doi.org/10.4028/www.scientific.net/amm.571-572.950.

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In order to guarantee the stability working of internal circuit of switching power supply, an internal power supply circuit with stabilization output was designed in this paper. Based on the voltage stabilization principle of zener diode, the internal power supply circuit put the high input voltage into 5v output voltage. Because of using module circuit, the circuit structure is simplified effectively. Based on 0.35um BCD technology, the internal power supply circuit was built in PSPICE. According to the experimental result, the internal power supply circuit can output stably in different input voltage and environmental temperature.

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Rozprawy doktorskie na temat "High Voltage Power Supply (HVPS)"

Beikoff, Geoffrey Noel. "A high power, high voltage switching power supply." Thesis, Queensland University of Technology, 1992. https://eprints.qut.edu.au/36226/1/36226_Beikoff_1992.pdf.

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A switching power supply to drive magnetrons for microwave heating has been designed, prototyped and tested. The magnetron has an rf power output of 6000 watts and requires a DC voltage of 7200 volts at a current of approximately 1.1 amps for a power input to the magnetron of 8000 watts. Six magnetrons are to be connected per railway tanker for heating the tankers at a railway terminus. The power supply has been designed for small size, efficiency and reliability. Current technology has been used. Insulated Gate Bipolar Transistors (IGBT) and power MOSFETs, both of moderately high current and voltage ratings, have been used at 25 kHz and 50 kHz switching frequencies respectively. MOSFETs of 20 amps and 500 volts and IGBT's of 40 amps and 600 volts ratings have been used. Ferrites for use at high switching frequencies have been used for transformers and iron powder material has been used for energy storage inductors. High quality insulating materials have been used to achieve the high voltage insulation requirements. Kapton, PTFE, mylar and nylon have been used where appropriate. Special features of the power supply include the power factor correction first stage, the use of the higher than normal leakage inductance of the power converter second stage transformer to make a resonant converter and the ripple cancelling effect of the series connection of the units on each phase. The power factor correction meets I EC 555 and AS2279 standards for harmonic content on the power supply source. The resonant converter yields zero load current switching of the converter transistors. The output 100 Hz ripple on the 7200 volt supply is negligible because of the series connection of the three outputs.

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Zabihi, Sasan. "Flexible high voltage pulsed power supply for plasma applications." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/48137/1/Sasan_Zabihi_Sheykhrajeh_Thesis.pdf.

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Demands for delivering high instantaneous power in a compressed form (pulse shape) have widely increased during recent decades. The flexible shapes with variable pulse specifications offered by pulsed power have made it a practical and effective supply method for an extensive range of applications. In particular, the release of basic subatomic particles (i.e. electron, proton and neutron) in an atom (ionization process) and the synthesizing of molecules to form ions or other molecules are among those reactions that necessitate large amount of instantaneous power. In addition to the decomposition process, there have recently been requests for pulsed power in other areas such as in the combination of molecules (i.e. fusion, material joining), gessoes radiations (i.e. electron beams, laser, and radar), explosions (i.e. concrete recycling), wastewater, exhausted gas, and material surface treatments. These pulses are widely employed in the silent discharge process in all types of materials (including gas, fluid and solid); in some cases, to form the plasma and consequently accelerate the associated process. Due to this fast growing demand for pulsed power in industrial and environmental applications, the exigency of having more efficient and flexible pulse modulators is now receiving greater consideration. Sensitive applications, such as plasma fusion and laser guns also require more precisely produced repetitive pulses with a higher quality. Many research studies are being conducted in different areas that need a flexible pulse modulator to vary pulse features to investigate the influence of these variations on the application. In addition, there is the need to prevent the waste of a considerable amount of energy caused by the arc phenomena that frequently occur after the plasma process. The control over power flow during the supply process is a critical skill that enables the pulse supply to halt the supply process at any stage. Different pulse modulators which utilise different accumulation techniques including Marx Generators (MG), Magnetic Pulse Compressors (MPC), Pulse Forming Networks (PFN) and Multistage Blumlein Lines (MBL) are currently employed to supply a wide range of applications. Gas/Magnetic switching technologies (such as spark gap and hydrogen thyratron) have conventionally been used as switching devices in pulse modulator structures because of their high voltage ratings and considerably low rising times. However, they also suffer from serious drawbacks such as, their low efficiency, reliability and repetition rate, and also their short life span. Being bulky, heavy and expensive are the other disadvantages associated with these devices. Recently developed solid-state switching technology is an appropriate substitution for these switching devices due to the benefits they bring to the pulse supplies. Besides being compact, efficient, reasonable and reliable, and having a long life span, their high frequency switching skill allows repetitive operation of pulsed power supply. The main concerns in using solid-state transistors are the voltage rating and the rising time of available switches that, in some cases, cannot satisfy the application’s requirements. However, there are several power electronics configurations and techniques that make solid-state utilisation feasible for high voltage pulse generation. Therefore, the design and development of novel methods and topologies with higher efficiency and flexibility for pulsed power generators have been considered as the main scope of this research work. This aim is pursued through several innovative proposals that can be classified under the following two principal objectives. • To innovate and develop novel solid-state based topologies for pulsed power generation • To improve available technologies that have the potential to accommodate solid-state technology by revising, reconfiguring and adjusting their structure and control algorithms. The quest to distinguish novel topologies for a proper pulsed power production was begun with a deep and through review of conventional pulse generators and useful power electronics topologies. As a result of this study, it appears that efficiency and flexibility are the most significant demands of plasma applications that have not been met by state-of-the-art methods. Many solid-state based configurations were considered and simulated in order to evaluate their potential to be utilised in the pulsed power area. Parts of this literature review are documented in Chapter 1 of this thesis. Current source topologies demonstrate valuable advantages in supplying the loads with capacitive characteristics such as plasma applications. To investigate the influence of switching transients associated with solid-state devices on rise time of pulses, simulation based studies have been undertaken. A variable current source is considered to pump different current levels to a capacitive load, and it was evident that dissimilar dv/dts are produced at the output. Thereby, transient effects on pulse rising time are denied regarding the evidence acquired from this examination. A detailed report of this study is given in Chapter 6 of this thesis. This study inspired the design of a solid-state based topology that take advantage of both current and voltage sources. A series of switch-resistor-capacitor units at the output splits the produced voltage to lower levels, so it can be shared by the switches. A smart but complicated switching strategy is also designed to discharge the residual energy after each supply cycle. To prevent reverse power flow and to reduce the complexity of the control algorithm in this system, the resistors in common paths of units are substituted with diode rectifiers (switch-diode-capacitor). This modification not only gives the feasibility of stopping the load supply process to the supplier at any stage (and consequently saving energy), but also enables the converter to operate in a two-stroke mode with asymmetrical capacitors. The components’ determination and exchanging energy calculations are accomplished with respect to application specifications and demands. Both topologies were simply modelled and simulation studies have been carried out with the simplified models. Experimental assessments were also executed on implemented hardware and the approaches verified the initial analysis. Reports on details of both converters are thoroughly discussed in Chapters 2 and 3 of the thesis. Conventional MGs have been recently modified to use solid-state transistors (i.e. Insulated gate bipolar transistors) instead of magnetic/gas switching devices. Resistive insulators previously used in their structures are substituted by diode rectifiers to adjust MGs for a proper voltage sharing. However, despite utilizing solid-state technology in MGs configurations, further design and control amendments can still be made to achieve an improved performance with fewer components. Considering a number of charging techniques, resonant phenomenon is adopted in a proposal to charge the capacitors. In addition to charging the capacitors at twice the input voltage, triggering switches at the moment at which the conducted current through switches is zero significantly reduces the switching losses. Another configuration is also introduced in this research for Marx topology based on commutation circuits that use a current source to charge the capacitors. According to this design, diode-capacitor units, each including two Marx stages, are connected in cascade through solid-state devices and aggregate the voltages across the capacitors to produce a high voltage pulse. The polarity of voltage across one capacitor in each unit is reversed in an intermediate mode by connecting the commutation circuit to the capacitor. The insulation of input side from load side is provided in this topology by disconnecting the load from the current source during the supply process. Furthermore, the number of required fast switching devices in both designs is reduced to half of the number used in a conventional MG; they are replaced with slower switches (such as Thyristors) that need simpler driving modules. In addition, the contributing switches in discharging paths are decreased to half; this decrease leads to a reduction in conduction losses. Associated models are simulated, and hardware tests are performed to verify the validity of proposed topologies. Chapters 4, 5 and 7 of the thesis present all relevant analysis and approaches according to these topologies.

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Weiser, Nicholas. "Dual High-Voltage Power Supply for use On Board a CubeSat." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1204.

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Since their conception in 1999, CubeSats have come and gone a long way. The first few that went into space were more of a “proof of concept,” and were more focused on sending simple data and photographs back to Earth. Since then, vast improvements have been made by over 40 universities and private firms, and now CubeSats are beginning to look towards interplanetary travel. These small satellites could provide a cost effective means of exploring the galaxy, using off the shelf components and piggy-backing on other launch vehicles with more expensive payloads. However, CubeSats are traditionally launched into Low Earth Orbit (LEO), and if an interplanetary satellite is to go anywhere from there, it will need a propulsion system. This thesis project’s main goal will be to investigate the possibility and capability of an Ion-Spray propulsion system. Several problems are to be tackled in this project: how to take a 9 V supply and boost it to a maximum potential difference of 5,000 V, all while minimizing the noise and testing the feasibility of such a system being flown on board a CubeSat.

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Jacobs, D. M. (Danver Maxwill). "Voltage control of medium to high power three-phase inverter supply systems." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52608.

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Thesis (MScEng)--University of Stellenbosch, 2001. ENGLISH ABSTRACT: In this thesis a new voltage control method is developed for a three-phase inverter supply system. The inverter supply system consist of a Permanent Magnet Generator, a three-phase rectifier, a three-phase inverter plus LC-filter and a three-phase transformer in series. This system supplies power to a network or to a stand-alone load. The main focus of this thesis is on the control aspects of the inverter and the LC-filter. Different voltage control systems are investigated and compared to each other. From these methods the proposed voltage control method is developed where only the output voltages are measured to establish good voltage control. All these voltage control methods are also simulated with a software package. The proposed voltage control method compares very well with other voltage control methods. The results that are obtained in the simulations are satisfactory. The proposed voltage control method is also implemented in an 8 kW laboratory scale model and, again, very good practical results are obtained. A TMS320F240 nsp controller is used to implement the proposed voltage control method. The controller compensates well for load steps, and these results compare well to an alternative voltage control method, which was also evaluated practically. AFRIKAANSE OPSOMMING: In hierdie tesis IS 'n nuwe spanningsbeheermetode ontwikkel VIr 'n drie-fase wisselrigter kragtoevoerstelsel. Die wisselrigter kragtoevoerstelsel bestaan uit 'n Permanent Magneet Generator, 'n drie-fase gelykrigter, 'n drie-fase wisselrigter plus Le-filter, en 'n drie-fase transformator in serie. Hierdie stelsel voorsien krag aan 'n netwerk sowel as aan 'n alleenstaande las. Die hooffokus van hierdie tesis is op die beheeraspekte van die wisselrigter en Le-filter. Verskillende spanningsbeheermetodes is deeglik ondersoek en vergelyk met mekaar. Uit hierdie metodes is dan die voorgestelde beheermetode ontwikkel waar slegs die uittreespanning gemeet word om goeie spanningsbeheer te kan doen. Al hierdie spanningsbeheermetodes is dan gesimuleer met 'n sagteware pakket. Die voorgestelde spanningsbeheermetode vergelyk baie goed met die ander spanningsbeheermetodes. Die resultate verky in die simulasies is ook baie bevredigend. Die voorgestelde beheermetode is ook geïmplementeer op 'n 8 kW laboratorium skaalmodel en weereens is baie goeie praktiese resultate verky. 'n TMS320F240 DSP-beheerder is gebruik om die voorgestelde beheermetode mee te implementeer. Die beheerder kompenseer baie goed vir lastrappe en vergelyk ook goed met 'n ander spanningsbeheermetode wat prakties ge-evalueer is.

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Myhre, Jørgen Chr. "Electrical Power Supply to Offshore Oil Installations by High Voltage Direct Current Transmission." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, 2001. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-383.

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This study was initiated to investigate if it could be feasible to supply offshore oil installations in the North Sea with electrical power from land. A prestudy of alternative converter topologies indicated that the most promising solution would be to investigate a conventional system with reduced synchronous compensator rating.The study starts with a summary of the state of power supply to offshore installations today, and a short review of classical HVDC transmission. It goes on to analyse how a passive network without sources influences the inverter. The transmission, with its current controlled rectifier and large inductance, is simulated as a current source. Under these circumstances the analysis shows that the network frequency has to adapt in order to keep the active and reactive power balance until the controllers are able to react. The concept of firing angle for a thyristor is limited in a system with variable frequency, the actual control parameter is the firing delay time.Sensitivity analysis showed some astonishing consequences. The frequency rises both by an increase in the active and in the reactive load. The voltage falls by an increase in the active load, but rises by an increase in the inductive load.Two different control principles for the system of inverter, synchronous compensator and load are defined. The first takes the reference for the firing delay time from the fundamental voltage at the point of common coupling. The second takes the reference for the firing delay time from the simulated EMF of the synchronous compensator. Of these, the second is the more stable and should be chosen as the basis for a possible control system.Two simulation tools are applied. The first is a quasi-phasor model running on Matlab with Simulink. The other is a time domain model in KREAN. The time domain model is primarily used for the verification of the quasi-phasor model, and shows that quasi-phasors is still a valuable tool for making a quick analysis of the main features when the details of the transients are of less importance.The study indicates that power supply by HVDC transmission from land to offshore oil installations could be technically feasible, even without the large synchronous compensators normally required. It has been shown that in a network only supplied by an inverter, variations of active and reactive loads have significant influence on both voltage and frequency. Particularly it should be noted that the frequency shows a positive sensitivity to increases in load. This could make the system intrinsically unstable in the case of a frequency dependent load such as motors.It was not a part of the study to optimize controllers, but even with simple controllers it was possible to keep the frequency within limits given by norms and regulations, but the voltages were dynamically outside the limits, though not very far. These voltage overswings take place in the first few instances after a disturbance, so it takes unrealistically fast controllers to handle them. They are partly due to the model, where the land based rectifier and the DC reactors are simulated by a constant current source, but partly they have to be handled by overdimensioning of the system.The simulations indicate that it should be technically possible to supply an oil platform with electrical power from land by means of HVDC transmission with small synchronous compensators. Whether this is financially feasible has not been investigated. Neither has it been considered whether the necessary equipment can actually be installed on an oil platform.Recently both ABB and Siemens have presented solutions for HVDC transmission in the lower and medium power range based on voltage source converters based on IGBTs. Fully controllable voltage source HVDC converters have properties that may be better suited than conventional line commutated current source thyristor inverters, to supply weak or passive networks, such as offshore oil installations, with electrical power. But they also have some disadvantages, and a complete technical and financial comparison must be performed in order to decide about any potential project.

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Devine, Phillip John. "A controllable, variable waveform, high voltage, switched mode power supply for electrostatic precipitators." Thesis, University of Leicester, 2000. http://hdl.handle.net/2381/30176.

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Increased awareness of the effects of atmospheric pollution has meant that electrostatic precipitators, which have been used since the early part of this century to separate particulate matter from process gas streams, are now required to achieve particulate collection efficiencies in excess of 99.7% for a number of processes. Increasingly stringent legislation concerning industrial particulate emissions has challenged the precipitation industry to consider how equipment can be improved to reduce, in particular, heavy metal and respirable size particulate discharges. Electrostatic precipitators charge dust particles in a gas stream by corona-producing electrodes, and remove the charged particles by electrostatic attraction under high electric fields. This thesis details the development of a prototype high frequency (20KHz), high voltage (50kV), high power (25 kW) switched mode precipitator power supply with technological advances over conventional units. A high frequency, high voltage, high power precipitator supply using high frequency inverter technology coupled to a novel ferrite cored, high voltage transformer-rectifier unit has been designed and built. It is capable of delivering in a controlled and responsive way 25kW at 50kV into a load that may suffer from sparking and flashover. The developmental stages of the prototype from initial concept through to field trials of the supply at a power station in the UK are detailed.

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Fu, Dianbo. "Improved Resonant Converters with a Novel Control Strategy for High-Voltage Pulsed Power Supplies." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/34432.

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The growing demand for high voltage, compact pulsed power supplies has gained great attention. It requires power supplies with high power density, low profile and high efficiency. In this thesis, topologies and techniques are investigated to meet and exceed these challenges. Non-isolation type topologies have been used for this application. Due to the high voltage stress of the output, non-isolation topologies will suffer severe loss problems. Extremely low switching frequency will lead to massive magnetic volume. For non-isolation topologies, PWM converters can achieve soft switching to increase switching frequency. However, for this application, due to the large voltage regulation range and high voltage transformer nonidealities, it is difficult to optimize PWM converters. Secondary diode reverse recovery is another significant issue for PWM techniques. Resonant converters can achieve ZCS or ZVS and result in very low switching loss, thus enabling power supplies to operate at high switching frequency. Furthermore, the PRC and LCC resonant converter can fully absorb the leakage inductance and parasitic capacitance. With a capacitive output filter, the secondary diode will achieve natural turn-off and overcome reverse recovery problems. With a three-level structure, low voltage MOSFETs can be applied for this application. Switching frequency is increased to 200 kHz. In this paper, the power factor concept for resonant converters is proposed and analyzed. Based on this concept, a new methodology to measure the performance of resonant converters is presented. The optimal design guideline is provided. A novel constant power factor control is proposed and studied. Based on this control scheme, the performance of the resonant converter will be improved significantly. Design trade-offs are analyzed and studied. The optimal design aiming to increase the power density is investigated. The parallel resonant converter is proven to be the optimum topology for this application. The power density of 31 W/inch3 can be achieved by using the PRC topology with the constant power factor control. Master of Science

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GARCIA, ORDÓÑEZ LUIS GUILLERMO. "High Voltage Power Supply System and Front-End DAQ on FPGA/SoC for High Energy Particle Detectors." Doctoral thesis, Università degli Studi di Trieste, 2022. http://hdl.handle.net/11368/3030919.

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High energy physics experiments are based on complex detectors built with novel techniques frequently configured in multichannel arrays. This complexity creates the need for custom-made related instrumentation and methods not often found in commercial devices. The research activity presented in this thesis aims at developing a distributed High Voltage Power Supply System (HVPSS) network for hybrid Micro-pattern Gaseous Detectors (MPGD) like the ones used in the RICH-1 detector of the COMPASS experiment at CERN. The hardware design was tested in several conditions including test beams at CERN in the SPS H4 beam line and with nuclear sources in the RD51 laboratory. The modular design as well as the reconfigurable capacity of the SoC-FPGA opened the possibility of using the HVPSS as a tool for other experiments. With few modifications, the system was successfully tested as a front-end Data Acquisition (DAQ) system for Water Cherenkov Detectors (WCD) in the context of indirect measurements of cosmic rays. Additional algorithms were implemented for online particle classification based on pulse-shape discrimination techniques. This thesis describes the basic concepts of the physics behind these detectors, as well as the electronics used for high energy particle detectors. It is followed by the most relevant aspects of the design process for the HVPSS and its modifications leading to the DAQ for WCDs. A description of the specific techniques developed for these applications and the most significant tests and results obtained during the research process are also presented. High energy physics experiments are based on complex detectors built with novel techniques frequently configured in multichannel arrays. This complexity creates the need for custom-made related instrumentation and methods not often found in commercial devices. The research activity presented in this thesis aims at developing a distributed High Voltage Power Supply System (HVPSS) network for hybrid Micro-pattern Gaseous Detectors (MPGD) like the ones used in the RICH-1 detector of the COMPASS experiment at CERN. The hardware design was tested in several conditions including test beams at CERN in the SPS H4 beam line and with nuclear sources in the RD51 laboratory. The modular design as well as the reconfigurable capacity of the SoC-FPGA opened the possibility of using the HVPSS as a tool for other experiments. With few modifications, the system was successfully tested as a front-end Data Acquisition (DAQ) system for Water Cherenkov Detectors (WCD) in the context of indirect measurements of cosmic rays. Additional algorithms were implemented for online particle classification based on pulse-shape discrimination techniques. This thesis describes the basic concepts of the physics behind these detectors, as well as the electronics used for high energy particle detectors. It is followed by the most relevant aspects of the design process for the HVPSS and its modifications leading to the DAQ for WCDs. A description of the specific techniques developed for these applications and the most significant tests and results obtained during the research process are also presented.

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Yang, Gang. "Design of a High Efficiency High Power Density DC/DC Converter for Low Voltage Power Supply in Electric and Hybrid Vehicles." Thesis, Supélec, 2014. http://www.theses.fr/2014SUPL0011/document.

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Cette thèse traite de la conception d’un convertisseur DC / DC destiné aux véhicules électriques et hybrides (2,5 kW, 400V/14V, 250kHz). Dérivé de la topologie LLC à résonance, ce convertisseur bénéficie des nombreux avantages propres à cette structure particulière. C’est ainsi que le prototype réalisé présente un rendement très élevé, une densité de puissance très forte avec des perturbations EMI très réduites. La première partie de cette thèse est consacrée à l’analyse théorique du circuit LLC afin de dégager un modèle de conversion et une stratégie de contrôle adaptée à l’application visée. Afin de conserver un rendement important sur une large plage de charge, une structure basée sur la mise en parallèle de deux modules LLC est proposée. Une nouvelle stratégie de contrôle à deux boucles est également proposée pour équilibrer le courant entre les deux modules. La seconde partie de la thèse fait appel à la simulation et à l’expérimentation. Il s’agit de minimiser la masse et l’encombrement tout en maximisant le rendement. Un composant magnétique spécial est conçu puis dimensionné pour intégrer le transformateur et diverses inductances de résonance. Ce convertisseur met également en œuvre un système de redressement synchrone robuste avec une compensation de phase, un module de puissance avec une résistance thermique très faible et un système de refroidissement efficace par air. Le rendement maximal mesuré est 95%. Le rendement demeure supérieur à 94% sur une plage de puissance s’étalant de 500 W à 2 kW. La densité de puissance est 1W/cm3. La CEM du convertisseur est développée dans cette thèse In this dissertation, a 2.5kW 400V/14V, 250kHz DC/DC converter prototype is developed targeted for electric vehicle/hybrid vehicle applications. Benefiting from numerous advantages brought by LLC resonant topology, this converter is able to perform high efficiency, high power density and low EMI. A first part of this dissertation is the theoretical analysis of LLC: topology analysis, electrical parameter calculation and control strategy. To arrange high output current, this thesis proposes parallel connected LLC structure with developed novel double loop control to realize an equal current distribution. The second part concerns on the system amelioration and efficiency improvement of developed LLC. A special transformer is dimensioned to integrate all magnetic components, and various types of power losses are quantified based on different realization modes and winding geometries to improve its efficiency. This converter also implements a robust synchronous rectification system with phase compensation, a power semiconductor module, and an air-cooling system. The power conversion performance of this prototype is presented and the developed prototype has a peak efficiency of 95% and efficiency is higher than 94% from 500W to 2kW, with a power density of 1W/cm3. The CEM analysis of this converter is also developed in this thesis

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Yan, Ning. "High-frequency Current-transformer Based Auxiliary Power Supply for SiC-based Medium Voltage Converter Systems." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/101507.

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Auxiliary power supply (APS) plays a key role in ensuring the safe operation of the main circuit elements including gate drivers, sensors, controllers, etc. in medium voltage (MV) silicon carbide (SiC)-based converter systems. Such a converter requires APS to have high insulation capability, low common-mode coupling capacitance (Ccm ), and high-power density. Furthermore, considering the lifetime and simplicity of the auxiliary power supply system design in the MV converter, partial discharge (PD) free and multi-load driving ability are the additional two factors that need to be addressed in the design. However, today’s state-of-the-art products have either low power rating or bulky designs, which does not satisfy the demands. To improve the current designs, this thesis presents a 1 MHz isolated APS design using gallium nitride (GaN) devices with MV insulation reinforcement. By adopting LCCL-LC resonant topology, the proposed APS is able to supply multiple loads simultaneously and realize zero voltage switching (ZVS) at any load conditions. Since high reliability under faulty load conditions is also an important feature for APS in MV converter, the secondary side circuit of APS is designed as a regulated stage. To achieve MV insulation (> 20 kV) as well as low Ccm value (< 5 pF), a current-based transformer with a single turn structure using MV insulation wire is designed. Furthermore, by introducing different insulated materials and shielding structures, the APS is capable to achieve different partial discharge inception voltages (PDIV). In this thesis, the transformer design, resonant converter design, and insulation strategies will be detailly explained and verified by experiment results. Overall, this proposed APS is capable to supply multiple loads simultaneously with a maximum power of 120 W for the sending side and 20 W for each receiving side in a compact form factor. ZVS can be realized regardless of load conditions. Based on different insulation materials, two different receiving sides were built. Both of them can achieve a breakdown voltage of over 20 kV. The air-insulated solution can achieve a PDIV of 6 kV with Ccm of 1.2 pF. The silicone-insulated solution can achieve a PDIV of 17 kV with Ccm of 3.9 pF. M.S. Recently, 10 kV silicon carbide (SiC) MOSFET receives strong attention for medium voltage applications. Asit can switch at very high speed, e.g. > 50 V/ns, the converter system can operate at higher switching frequency condition with very small switching losses compared to silicon (Si) IGBT [8]. However, the fast dv/dt noise also creates the common mode current via coupling capacitors distributed inside the converter system, thereby introducing lots of electromagnetic interference (EMI) issues. Such issues typically occur within the gate driver power supplies due to the high dv/dt noises across the input and output of the supply. Therefore, the ultra-small coupling capacitor (<5 pF) of a gate driver power supply is strongly desired.[37] To satisfy the APS demands for high power modular converter system, a solution is proposed in this thesis. This work investigates the design of 1 MHz isolated APS using gallium nitride (GaN) devices with medium voltage insulation reinforcement. By increasing switching frequency, the overall converter size could be reduced dramatically. To achieve a low Ccm value and medium voltage insulation of the system, a current-based transformer with a single turn on the sending side is designed. By adopting LCCL-LC resonant topology, a current source is formed as the output of sending side circuity, so it can drive multiple loads importantly with a maximum of 120 W. At the same time, ZVS can use realized with different load conditions. The receiving side is a regulated stage, so the output voltage can be easily adjusted and it can operate in a load fault condition. Different insulation solutions will be introduced and their effect on Ccm will be discussed. To further reduce Ccm, shielding will be introduced. Overall, this proposed APS can achieve a breakdown voltage of over 20 kV and PDIV up to 16.6 kV with Ccm<5 pF. Besides, multi-load driving ability is able to achieve with a maximum of 120 W. ZVS can be realized. In the end, the experiment results will be provided.

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Książki na temat "High Voltage Power Supply (HVPS)"

Sturman, John C. High-voltage, high-power, solid-state remote power controllers for aerospace applications. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985.

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Teh-Ming, Chu, Stevens N. John, and United States. National Aeronautics and Space Administration., eds. Conceptual definition of a high voltage power supply test facility: Final technical report. National Aeronautics and Space Administration, 1989.

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J, King Roger, Mayer Eric, and United States. National Aeronautics and Space Administration., eds. Study of a high voltage ion engine power supply: NASA grant NAG3-1576. National Aeronautics and Space Administration, 1996.

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Stuart, Thomas A. Study of a high voltage ion engine power supply: NASA grant NAG3-1576. National Aeronautics and Space Administration, 1996.

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G, Oklobdzija Vojin, ed. Digital system clocking: High-performance and low-power aspects. IEEE, 2003.

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Transport, European Commission Directorate-General, ed. HVB: High voltage booster. Office for Official Publications of the European Communities, 1999.

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National Aeronautics and Space Administration (NASA) Staff. Study of a High Voltage Ion Engine Power Supply. Independently Published, 2018.

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Oklobdzija, Vojin G., Vladimir M. Stojanovic, Dejan M. Markovic, and Nikola M. Nedovic. Digital System Clocking: High-Performance and Low-Power Aspects. Wiley-IEEE Press, 2003.

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Części książek na temat "High Voltage Power Supply (HVPS)"

Hu, Zixin, Song Yuan, Zhuoran Wang, and Min Zeng. "Research on Resonant High-Voltage Plasma Power Supply." In Transactions on Intelligent Welding Manufacturing. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7215-9_10.

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Do, Thai M., Minh H. Ho, Thien B. T. Do, Nam P. Nguyen, and Vo Van Toi. "A Low Cost High Voltage Power Supply to Use in Electrospinning Machines." In IFMBE Proceedings. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-5859-3_16.

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Singh, Archana, Sanjay Kumar Sinha, Kamlesh Pandey, and Nibha Rani. "Design of Efficient DC Power Supply for High-Voltage Low-Current Applications." In Advances in Intelligent Systems and Computing. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-5903-2_94.

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Chen, Weihua, Tao Tang, Xuzhe Xu, Ping Yan, and Cunxi Liu. "Development of MPC High Voltage Nanosecond Pulsed Coaxial Plasma Igniter Drive Power Supply." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-0451-8_13.

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Cai, Xinjian, Tianjian Li, and Jiaxin Chen. "Power Supply Loss Riding Through Method for High-Voltage Great-Power Cascaded H-Bridge Multilevel Inverters." In Advances in Smart Vehicular Technology, Transportation, Communication and Applications. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-70730-3_24.

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Nisoa, M., D. Srinoum, and P. Kerdthongmee. "Development of High Voltage High Frequency Resonant Inverter Power Supply for Atmospheric Surface Glow Barrier Discharges." In Solid State Phenomena. Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/3-908451-12-4.81.

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Yingqi, Lei, Hu Manyin, Liu Yujing, Gao Xinglin, and Wang Liqian. "Study on Efficiency Enhancing and Energy Saving of High Voltage Power Supply of EP." In Electrostatic Precipitation. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-89251-9_62.

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Jin, Jeong-Tae, Seung-Ho Jeong, Kwang-Won Lee, Dae-Sik Chang, Doo-Hee Chang, and Byung-Hoon Oh. "Design of a High Voltage Acceleration Power Supply for a Neutral Beam Injection System." In Communications in Computer and Information Science. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-26010-0_47.

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Henzler, Stephan, Georg Georgakos, Jörg Berthold, and Doris Schmitt-Landsiedel. "Single Supply Voltage High-Speed Semi-dynamic Level-Converting Flip-Flop with Low Power and Area Consumption." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-30205-6_41.

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Lu, Xiaolong, Shangwen Chen, Zhiming Hu, Dapeng Xu, and Zeen Yao. "Structure Design and Electric Field Simulation of a Compact −150 kV/10 mA High Voltage Power Supply." In Lecture Notes in Electrical Engineering. Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1528-4_24.

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Streszczenia konferencji na temat "High Voltage Power Supply (HVPS)"

Parkash, Ved, Parveen Kumar, and Gaurav Sapra. "Design and simulation of flyback based adjustable high voltage power supply (HVPS) for electro-spinner." In PROCEEDINGS OF INTERNATIONAL CONFERENCE ON RECENT TRENDS IN MECHANICAL AND MATERIALS ENGINEERING: ICRTMME 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0025800.

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Lazard, C. J., A. Bromborsky, D. Conrad, and W. Shaheen. "100 kW high voltage power supply." In Conference Record of the 2000 Twenty-fourth International Power Modulator Symposium. IEEE, 2000. http://dx.doi.org/10.1109/modsym.2000.896178.

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Alexandru, Iordache Cosmin, Grecu Cristian, and Bodea Mircea. "Variable regulated high voltage power supply." In 2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE). IEEE, 2016. http://dx.doi.org/10.1109/isfee.2016.7803163.

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Strickland, B. E., and M. Garbi. "High frequency, high voltage capacitor charging power supply." In OSA Annual Meeting. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.tuaa5.

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A high frequency, high voltage power supply employing a series resonance inverter has been developed for applications where compact, lightweight, high repetition rate, efficient capacitor charging is required. The power supply has a capacitor charging capability of 10 kJ/s at 25 kV. By using parallel MOSFETS operating at up to 80 kHz and controlling the duty cycle of the series resonance inverter, 0.1% regulation was achieved. The high voltage transformer is a modular pancake design which has a self-resonance of 750 kHz and a turn ratio of 1:125 resulting in good coupling. Uses are in pulsed power and lasers where high repetition rate capacitor charging with high accuracy is required.

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Kuang, A. X., L. Y. Chai, G. H. Hu, S. N. Pan, and T. S. Zhou. "Piezoelectric Ceramic Transformer High Voltage Power Supply." In Sixth IEEE International Symposium on Applications of Ferroelectrics. IEEE, 1986. http://dx.doi.org/10.1109/isaf.1986.201235.

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Gollor, Matthias, Michael Boss, Frank Herty, Bernhard Kiewe, Kurt Rogalla, and Rafael Braeg. "Generic High Voltage Power Supply - Next Generation." In 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. American Institute of Aeronautics and Astronautics, 2007. http://dx.doi.org/10.2514/6.2007-5215.

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Li, Wei, Qingxiang Liu, and Zhengquan Zhang. "High power density high voltage power supply based on AC-link." In 2015 54th Annual Conference of the Society of Instrument and Control Engineers of Japan (SICE). IEEE, 2015. http://dx.doi.org/10.1109/sice.2015.7285301.

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Pokryvailo, A., C. Carp, and C. Scapellati. "A high-power high voltage power supply for long-pulse applications." In 2009 IEEE Pulsed Power Conference (PPC). IEEE, 2009. http://dx.doi.org/10.1109/ppc.2009.5386363.

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Dallago, E., S. Ruzza, G. Venchi, and S. Morini. "Low Voltage Floating Supply in Monolithic High Voltage Technology for High dV/dt Applications." In 2007 IEEE Power Electronics Specialists Conference. IEEE, 2007. http://dx.doi.org/10.1109/pesc.2007.4342132.

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Giesselmann, Michael, Travis Vollmer, Ryan Edwards, Thomas Roettger, and Madhav Walavalkar. "Compact HV-DC Power Supply." In 2008 IEEE International Power Modulators and High Voltage Conference (IPMC). IEEE, 2008. http://dx.doi.org/10.1109/ipmc.2008.4743626.

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Raporty organizacyjne na temat "High Voltage Power Supply (HVPS)"

Newell, Matthew R. Modular High Voltage Power Supply. Office of Scientific and Technical Information (OSTI), 2017. http://dx.doi.org/10.2172/1358154.

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NORTHROP GRUMMAN CORP ROLLING MEADOWS IL. Manufacturing Technology for High Voltage Power Supplies (HVPS). Volume I - Program Summary. Defense Technical Information Center, 1996. http://dx.doi.org/10.21236/ada324364.

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NORTHROP GRUMMAN CORP ROLLING MEADOWS IL. Manufacturing Technology for High Voltage Power Supplies (HVPS). Volume II - Program Details. Defense Technical Information Center, 1996. http://dx.doi.org/10.21236/ada324475.

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NORTHROP GRUMMAN CORP ROLLING MEADOWS IL. Manufacturing Technology for High Voltage Power Supplies (HVPS). Volume IV. Reference Information. Defense Technical Information Center, 1996. http://dx.doi.org/10.21236/ada324508.

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Nguyen, Ruby, Mike Severson, Bo Zhang, et al. Electric Grid Supply Chain Review: Large Power Transformers and High Voltage Direct Current Systems. Office of Scientific and Technical Information (OSTI), 2022. http://dx.doi.org/10.2172/1871501.

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Clanin, W., I. Krichtafovitch, D. White, and C. Gnehm. Innovative, new and advanced high voltage power supply for capacitor charging at linear collider. Final report. Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/761042.

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Hopper. L30500 Analysis of the Effects of High-Voltage Direct-Current Transmission Systems on Buried Pipelines. Pipeline Research Council International, Inc. (PRCI), 2008. http://dx.doi.org/10.55274/r0010196.

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The economics of high voltage direct current for long-distance transmission of electrical energy have been reported as very attractive, to the extent that several projects are in the making. Several reasons other than the savings in transmission costs, for example the exchange of peak power between time zones and seasonal zones, would permit utilities to save on plant investment for generating capacity while maintaining a high level of service. This report summarizes work on the initial phase of a study to determine the effects of high-voltage direct-current (H.V.D.C.) electric transmission lines on buried pipeline systems. Pipeline Research Council International, Inc. initiated this work in response to an anticipated threat posed by the Pacific Northwest-Southwest Intertie H.V.D.C. system now being designed (and other possible H.V.D.C. lines in the future) because of the announced plans to pass direct current through the earth. The objectives of the overall program are:(1) To determine the nature and magnitude of problems that will be created by the earth current from H.V.D.C. systems, and(2) To devise means of protecting pipelines from the effects of such currents. A computer program was written based on a mathematical model of a buried pipeline in the environment created by an H.V.D.C. system. Excellent agreement was obtained between computed soil potential gradients and measurements obtained during a field test of H.V.D.C. in Oregon. Reasonably good agreement was also obtained between measured pipe-to-soil potentials on the Pacific Lighting Gas Supply Company pipeline near Camino, California, and computed values during a field test of H.V.D.C. power transmission.

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